An FIU with an Open-Circuit Simulation on Channel 1 Short to Ground or Short to Power
You can open this relay to simulate a hard break or open and close it at a specified time interval to simulate an intermittent connection or loose contacts.įigure 3. To simulate an open circuit or interrupt fault, the signal line between the test application and device under test (DUT) is left open to determine how the DUT behaves after a signal interruption. An FIU in the Default Mode of Operation – All Signals Are Passed Through Open Circuit Faults
The first relay of the channel acts as a pass-through – during the default mode of operation, this relay is closed, and the FIU is transparent to both the ECU and the test system.įigure 2. In this topology, each FIU channel consists of three single-pole-single-throw (SPST) relays. A common configuration for an FIU is a “fault bus topology,” where you can open or short each channel to one or more fault buses.
